{"NOAAStudyId":"13670","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2012-12-26","dataPublisher":"NOAA","dataType":"SPELEOTHEMS","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/speleothem","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-cave-13670.xml","doi":null,"earliestYearBP":2765,"earliestYearCE":-815,"entryId":"noaa-cave-13670","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"0502535, 3961103404, 1003690"},{"fundingAgency":"Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP), Brazil","fundingGrant":"2006/06761-0 and 2011/ 39450394"}],"investigators":"Novello, V.F.; Cruz, F.W.; Karmann, I.; Burns, S.J.; Stríkis, N.M.; Vuille, M.; Cheng, H.; Edwards, R.L.; Santos, R.V.; Frigo, E.; Barreto, E.A.S.","mostRecentYearBP":39,"mostRecentYearCE":1911,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/13670","originalSource":null,"publication":[{"abstract":"We present the first high resolution, approximately ~4 years sample spacing, precipitation record from northeastern Brazil (hereafter referred to as 'Nordeste') covering the last ~3000 yrs from 230Th-dated stalagmites oxygen isotope records. Our record shows abrupt fluctuations in rainfall tied to variations in the intensity of the South American summer monsoon (SASM), including the periods corresponding to the Little Ice Age (LIA), the Medieval Climate Anomaly (MCA) and an event around 2800 yr B.P. Unlike other monsoon records in southern tropical South America, dry conditions prevailed during the LIA in the Nordeste. Our record suggests that the region is currently undergoing drought conditions that are unprecedented over the past 3 millennia, rivaled only by the LIA period. Using spectral, wavelet and cross-wavelet analyses we show that changes in SASM activity in the region are mainly associated with variations of the Atlantic Multidecadal Oscillation (AMO) and to a lesser degree caused by fluctuations in tropical Pacific SST. Our record also shows a distinct periodicity around 210 years, which has been linked to solar variability.\r\n","author":null,"citation":"Valdir F. Novello, Francisco W. Cruz, Ivo Karmann, Stephen J. Burns, Nicolás M. Stríkis, Mathias Vuille, Hai Cheng, R. Lawrence Edwards, Roberto V. Santos, Everton Frigo, and Eline A.S. Barreto. 2012.\r\nMultidecadal climate variability in Brazil's Nordeste during the last 3000 years based on speleothem isotope records.\r\nGeophysical Research Letters, Vol. 39, L23706.\r\nDOI: 10.1029/2012GL053936","edition":null,"identifier":{"id":"10.1029/2012GL053936","type":"doi","url":"http://dx.doi.org/10.1029/2012GL053936"},"issue":null,"journal":"Geophysical Research Letters","pages":null,"pubRank":"1","pubYear":2012,"reportNumber":null,"title":"Multidecadal climate variability in Brazil's Nordeste during the last 3000 years based on speleothem isotope records","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["Monsoon"],"site":[{"NOAASiteId":"54318","geo":{"geoType":"Feature","geometry":{"coordinates":["-12.3667","-41.5667"],"type":"POINT"},"properties":{"easternmostLongitude":"-41.5667","maxElevationMeters":"680","minElevationMeters":"680","northernmostLatitude":"-12.3667","southernmostLatitude":"-12.3667","westernmostLongitude":"-41.5667"}},"locationName":"Continent>South America>Brazil","mappable":"Y","paleoData":[{"NOAADataTableId":"23350","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>speleothems>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/diva2012.txt","linkText":"diva2012.txt","urlDescription":"Speleothem","variables":[{"cvAdditionalInfo":null,"cvDataType":"SPELEOTHEMS","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"SPELEOTHEMS","cvDetail":"raw","cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate>calcium carbonate","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]}],"dataTableName":"DV2","dataTableNotes":null,"earliestYear":-815,"earliestYearBP":2765,"earliestYearCE":-815,"mostRecentYear":1911,"mostRecentYearBP":39,"mostRecentYearCE":1911,"species":[],"timeUnit":"AD"}],"siteName":"Diva de Maura Cave"}],"studyCode":null,"studyName":"Diva de Maura Cave, Brazil 2700 Year Stalagmite Oxygen Isotope Data","studyNotes":"Stalagmite oxygen isotope (d18O) collected in the Diva de Maura, Torrinha and Lapa Doce cave systems, located near Iraquara City in Bahia State, in the southern portion of the Nordeste region of Brazil.\nThe DV2 sample is a 25-cm-long stalagmite collected in Diva Cave which grew continuously during most of the last 2850 years except for the last century. \nThe missing modern portion of the DV2 isotope record is complemented with the stalagmites TR5 and LD12 (12°20’S, 41°36’W) that cover the last 130 years. \n","version":"1.0","xmlId":"11692"}